Hot-air furnace



M. GREENEBAUM. Hot-Air Furnace.

Patented Jan. 23,1855.

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UNITED STATES PATENT OFFICE;

MICHAEL GREENEBAUM, OF.GHICAGO, ILLINOIS.

- HOT-AIR FURNACE.

Specification of Letters Patent No. 12,277, dated January 23, 1855.

T0 aZZ whom it may concern Be it known that I, MICHAEL GREEN BAUM, of the city of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Apparatus for Heating Buildings with Hot Air, which I term Greenebaums Double Cylinder Hot Air Furnace; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The nature of my invention consists in the construction of a drum to be attached to an ordinary furnace for the purpose of effectual, and equal, radiation of the heat, also in regulating the intensity of the heat by a simple throttle valve.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operations, reference being had to the drawings where Figure 1, represents a section in perspective of a furnace with the radiating drum attached; also of the hot air chamber in which the furnace and drum is placed; Fig. 2 is a plan, or top 'view, showing the position of the furnace, and drum, and arrangement of pipes; Fig. 3, a front elevation of the furnace and drum; Fig. 4, a front elevation of the hot air chamber showing the position of the doors to ash-pit, mouth of furnace, and door for cleaning out the drum.

a, Fig. 1, represents a common sheet iron cylindric furnace; Z), the fire grating; 0, the sifting grate; (Z, the ash pan; 6, the lining of fire brick; f, the throat for reception of fuel; h, the bottom, and, i, the top of the hot air chamber; 7', j, openings for admission of cold air; 70 represents a sheet iron drum, having the end closed perfectly air tight by riveting, or fianging; Z, is a cylinder of sheet iron having its axes in the same line with the axes of the drum; this cylinder is supported on brackets m, m, attached to the inner surface of the drum; n represents a metallic partition in the drum; the upper end of the cylinder Z,'is flanged and riveted to the partition n; this partition is perforated with a number of holes, or openings as shown at 0, 0, &c.; these perforations are made to open in the space between the cylinder Z, and the drum is, p, is a sheet iron pipe, or funnel attached to the furnace, and extending into the drum nearly across its diameter; 9 is a branch of this pipe extending downward through partition a and opening into cylinder Z v, represents a common sheet iron pipe attached to the drum and passing by means of elbows around the drum conducts the smoke from the drum to a chimney or flue in the building; 8 represents a throttle valve near the end of the funnel p, the rod to which this valve is attached extends to the outside of the hot air chamber, as shown at Z, on Figs. 2, and 4:; u, u, to, represent the hot air pipes opening into the hot air chamber.

a, Fig. 8, is a slide covering an opening in the drum giving access to the interiorof the same for the purpose of cleaning it.

The operation of this apparatus is as follows: The throttle valve 8 being closed in,

the funnel p the heat from furnace a,,descends through the branch pipe ginto the inner cylinder Z, and is discharged into the drum near the bottom of the same; the heat then rises in the space between the cylinder Z and the drum is and passing through the openings 0, 0, &c., in partition a, the residue passes off through pipe 1" to the chimney. By opening the throttle valve 8, the heat passes directly into pipe 1, thereby allowing the drum k, to be cooled to any required deree.

What I claim as my invention and desire to secure by Letters Patent is The arrangement of the cylinder Z, in the drum is, in combination with the perforated partition n, and the pipes 7), g, and r, and valve 8, for the purpose of regulating and equalizing the radiation of heat, of hot air furnaces, substantially as set forth in the above specification.

MICHAEL GREENEBAUM. Witnesses:

JOHN M. VANORDEE, H. N. HEALD. 

